title: Oxygen permeability measurements of contact lenses: a proposal for accuracy improvement.
abstract: Contact lens are a widespread medical device. In view of the importance of a proper oxygenation of the cornea, new materials are continuously being tested, with a high permeability to oxygen. Taking into account the limitations of the methods for testing soft contact lenses, as presented in the relevant international standards, this paper focuses on the polarographic method and on the approach of measuring oxygen permeability of stacked contact lenses. The effect of the interspersed saline solution layers on the measurable permeability of the stack is considered, using Fick's law of diffusive flux, and a proposal for accuracy improvement in oxygen permeability measurements is presented.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: D'Avenio
authors.forename: Cecilia
authors.initials: C
authors.lastname: Poli
authors.forename: Carla
authors.initials: C
authors.lastname: Daniele
authors.forename: Mauro
authors.initials: M
authors.lastname: Grigioni
mesh_terms: D003263:Contact Lenses, Hydrophilic; D003315:Cornea / Q000378:metabolism; D008962:Models, Theoretical; D010100:Oxygen / Q000378:metabolism*; D010101:Oxygen Consumption / Q000502:physiology; D010539:Permeability; D011048:Polarography / Q000295:instrumentation / Q000379:methods
chemical_list: D010100:Oxygen